objectId property
A user-supplied object ID.
If you specify an ID, it must be unique among all pages and page elements
in the presentation. The ID must start with an alphanumeric character or
an underscore (matches regex [a-zA-Z0-9_]
); remaining characters may
include those as well as a hyphen or colon (matches regex
[a-zA-Z0-9_-:]
). The length of the ID must not be less than 5 or greater
than 50. If you don't specify an ID, a unique one is generated.
Implementation
core.String? objectId;